window.opener.document.getElementById("hdnprocessInstOID").value

根据引用和引用，"window.opener.document.getElementById("hdnprocessInstOID").value"是用于获取父窗口中id为"hdnprocessInstOID"的元素的值。具体来说，window.opener表示创建当前窗口的父窗口的引用，而document.getElementById("hdnprocessInstOID")表示获取父窗口中id为"hdnprocessInstOID"的元素。通过.value则可以获取该元素的值。所以，"window.opener.document.getElementById("hdnprocessInstOID").value"是用来获取父窗口中id为"hdnprocessInstOID"的元素的值。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
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